Log-turner



- (No Mode1.) G. M. PEL-TON.

LOG TURNER.

No. 588,800. Patented Aug. 24, 1887.

\ TAL W @www UNITED STATES' PATENT OFFICE.

GEORGE M. PELTON, OF BELMONT, NEW YORK.

LOG-TU RN ER.

SPECIFICATION forming part of Letters Patent No. 588,600, dated August 24, 1897. Application iled December 26, 1893. `Serial No. 494,754. `(No model.)

To @ZZ whom, it may concern,.- Be it known that I, GEORGE M. PnLToN, a' citizen of the United States, residing at Belmont, in the county of Allegany and State of New York, have invented certain new and useful Improvements in Log-Turners, of

which the following isaspecilication, refer- In the accompanying drawings, Figure 1 l shows an elevation of a log-mover constructed according to my invention'with parts in section. Fig. 2 is a section of the cylinder and pistons on a larger scale, Fig. 3 isa plan of the yoke and its connection th rough which the lever works.

Referring now to the details of the drawings by letter, A represents an upright to which are bolted the cross-bars B, between which is secured the yoke C. Above the yoke and cross-bars are the skidways D, over which the logs travel to the carriage E, supporting the head-blocks F. Between the walls of this yoke travels the bar Gr, provided with pivoted teeth g and having its lower end connected to the cross-head H of a hollow piston-rodI by means of a link .I and having a lateral vextension G', which is connected to the upper end of a solid piston-rod K, which has attached to it a cross-head L, working (as does the crosshead H) on a guide-rod M, whose ends are secured in the under side of the yoke C,`and the head N of a cylinder O, secured to the upright A by bolts, as shown. VAt the lower ends of these piston-rods are the pistons P Q, tting steam-tight in the cylinder O. On oe side of the cylinder is a steam-passage R, in which works a tube S, whose upper end is screwed into the cross-head H, and its bore communi- `-will pass up through said tube, through passage h, and down between the outside of the vrod K and the inside of the hollow rod I to the space between the pistons, where it may be used to separate said pistons, as hereinafter described.

At T is shown a steam-chest or valve-case in which t is the inlet and t' the exhaust. In this works a valve (not shown) which, as it lforms no part of the invention herein claimed `and as any suitable form of valve may be used, need not be illustrated or described here.

At U U' are shown two ports to admit steam, the upper one, U, receiving steam through the pipe u. from the chest T. At V is an exhaustport which is set at a short distance from the bottom, so as to trap the exhaust and form a cushion for the piston and prevent its striking the lower cylinder-head when descending.

The operation is as follows: Supposing the pistons to be in their lowest position, the valve is so operated as to admit steam below the lower piston, which will cause the toothed bar to rise vertically and give a rotating movement to the log on the carriage, which ceases when steam is admitted'abovel the upper piston. Exhaustingthe steam from below the piston will cause vthe toothed bar to descend to its former position without disturbing the log, owing to the pivot'ed teethyielding asthey descend. W hen steam is admitted between the pistons through the tubes S and hollow pistonrod I, it will cause the pistons to move in opposite directions, thereby swinging the upper end of the toothed bar back from the vertical position, as shown in dotted lines, and if steam be admitted above and below the piston simultaneously the upper end of the bar will swing toward the vertical position', thus moving the log from the skidway to the head-blocks.

It will thus be seen that by a proper manipulation 'of the valve so as to give the bar the proper movements vertically and sidewise I can take alog from thev skidway of a sawmill, roll it onto'thecarriage, and then rotate it any required number of degrees or press it rmlyagainst head-block-knees, as desired.

1 am aware that it has before been proposed to work two or more pistons of the same diam- IOO eter in a single cylinder of a steam-engine, and therefore do not claim this feature broadly; but I am not aware that any of such engines have ever had passages for the steam capable of delivering the same between the pistons at any part of the cylinder.

I am also aware that it has been proposed to use two pistons of dilerent sizes inclosed in the same cylinder to operate a log-turner, one of which pistons works within the other, which latter performs the function of a cylinder for the first piston, so that although said first piston is within the main cylinder it docs not work in contact with the walls thereof. I deem my invention much superior to said log-turner, inasmuch as the main cylinder of the latter is necessarily longer than mine, and the larger piston is also much larger and heavier than is necessary with my invention, so that my log-turner could be made cheaper, lighter, and less cumbersome, and as both my pistons are comparatively light much less steam is necessary to operate the same than would be where a piston is used that is large enough to form a cylinder for another piston. A heavy piston in a log-turner is especially objectionable, as the entire weight of the piston has to be lifted the whole length of the stroke, the movement of the same being vertical.

IVhat I claim as new isl. In alog-turner, the combination of a cylinder, two pistons of the same diam eter working therein, and a bar for operating on the log, connected with both pistons,substantially as described.

2. In a log-turner, the combination of a cylinder, two pistons of the same diameter working therein, a bar for operating on the log, and connections between the pistons and operating-bar one of said pistons being connected to the bar near the lower end thereof and the other to a lateral extension of the same, whereby the pistons may move said bar laterally, substantially as described.

3. In a log-turner, the combination of a cylinder, two pistons of the same diameter working therein, a toothed bar connected with both pistons, and inlet and exhaust ports arranged to admit or exhaust steam or other operating fluid at any portion of the stroke, substantially as described.

4.-. The combination ina log-turner, of a cylinder, two pistons of the same diameter working therein, a bar for operating on the log having a lateral extension pivotally connected with one of the pistons, and a link connecting it with the other, substantially as described.

5. rlhe combination ina log-turner, of abar for operating on the log, a cylinder, two pistons of the same diameter working therein, a hollow piston-rod connected with said bar, a second piston-rod working in the hollow piston-rod and connected with an extension on said bar, a passage connected with the steamsupply and a tubo working' therein whose bore connects with the hollow piston-rod, substantially as described.

6. The combination in a log-turner, of a toothed bar G having extension Gr', a cylinder O, pistons P Q working therein, piston-rods I K connected to said pistons and the extension Gr' and bar G respectively, the crosshead II having a passage h communicating with the hollow piston-rod K, link J connecting the toothed bar with the cross-head I-I, a steam-passage R in the cylinder connecting with the steam-supply, a tube S running in said passage R and connected to the crosshead II and passage h, and suitableinlet and exhaust passages, substantially as described.

7. In a log-turn er, the combination of a cylinder, two pistons of the same diam eter working therein, each arranged and adapted to travel through the major part of the length of the cylinder, and a passage for the motive force adapted to deliver the same between the pistons at any part of the cylinder, substantially as described.

8. In a log-turner, the combination of a cylinder, two pistons of the same diameter working therein, arranged and adapted to work through the major part of the length of the cylinder, a passage for the motive force adapted to deliver the same between the pistons at any part of the cylinder, and a bar for operating on the log connected with both pistons, substantially as described.

9. In alog-turner, the combination of a cylinder, two pistons of the same diameter working therein, arranged and adapted to work through the major part of the length of the IOO cylinder, a passage for the motive force adapted to deliver the same between the pistons at any part ofthe cylinder, a bar for operating on the log, and connections between the pistons and operating-bar, one of said pistons being connected tothe bar near the lower end thereof and the other to a lateral extension of the same, whereby the pistons may move said bar laterally, substantially as described.

l0. In a log-turner, the combination of a cylinder, two pistons of the same diameter working therein, a toothed bar connected with both pistons, andinlet and exhaust ports arranged to admit or exhaust steam or other operating iuid between the pistons at any portion of the cylinder, substantially as described.

l1. The combination in a log-turner, of a cylinder, two pistons of the same diameter working therein, a bar for operating on the log having a lateral extension pivotally connected with one of the pistons, and a link connecting it with the other, substantially as described.

12. The combination in a log-turner, of a bar for operating on the log, a cylinder, two pistons of the same diameter workingtherein, a hollow piston-rod connected with said bar, a second piston-rod working in the hollow piston-rod and connected with an extension on said bar, a passage connected with the steam-supply, and a tube working therein whose bore connects with the hollow pistonrod, substantially as described.

13. The combination in a log-turner, of a bar for operating on the log, a cylinder, two pistons of the same diameter Working therein, a hollow piston-rod connected with said bar, a second piston-rod working in the hollow piston-rod and connected with an extension on said bar, and a cross-head carried by one of the piston-rods, having a steam-passage through it connecting the space between the pistons with ,the source of power, substantially as described.l

14. The combination in a log-turner, of a bar for operating on the log, a cylinder, two pistons of the same diameter Working therein, a hollow piston-rod connected with said bar, a second piston-rod working in the hollow piston-rod and connected with an extension on said bar, a cross-head carried by one of the piston-rods, having a steam-passage through it connecting with the hollow piston-rod, and

a pipe whose bore connects with said passage and the source of power, substantially as described.

15. The combination in a log-turner, of a bar for operating on the log, a cylinder, two pistons of the same diameter working therein, a hollow piston-rod connected with said bar, a second piston-rod working in the hollow piston-rod and connected with an extension on said bar, a cross-head carried by one of lthe piston-rods, having a steam-passage through it connecting with the hollow piston-rod, a pipe whose bore connects with said passage, and a second passage in which said pipe works arranged parallel with the c'ylindei` and communicating with the source of power, substantially as described.

In testimony whereof Iaffix my signature, in presence of two witnesses, this 22d day of December, 1893.

GEORGE M. PELTON. Witnesses:

H. L. WHITCOMB, A. H. WATERS. 

